Post-Lecture Exercise
1 45ƒ = ö/4 radians 60ƒ = ö/3 radians
80ƒ = 4ö/9 radians 2 full turns = 4ö radians
2 ö radians = 180ƒ 3 radians = 171.9ƒ
3 f(x) = sin x is an ODD function.
4 f(2.5) = 0.598 f(ö/4) = 0.707
f(20) = 0.913 f(ñ4) = 0.757
fñ1(0.5) = 0.524 fñ1(0.3) = 0.305 fñ1(ñ0.6) = ñ0.644
5 The domain of f(x) = sin x is the Real Numbers
6 The domain of the inverse function is ñ1 ä x ä 1